DEPARTMENT OF MOLLUSKS. 177 



The manual of North American land shells, by Mr. W. G. Binuey,* 

 is based in large part upon a collection named and presented by him, 

 which has been arranged in accordance with the manual and placed in a 

 special case for immediate reference at any time by those interested. 



The bibliography of the writings of the venerable Nestor of conchology 

 in the United States, Dr. Isaac Lea,t is also noticed in the Museum 

 bibliography. The types of the species, with few exceptions, are con- 

 tained in the National Collection, which has been enriched from time to 

 time from Dr, Lea's unrivaled cabinet. 



LIST OF EGRESSIONS. 



Services have been rendered and material sent out by the department 

 of mollusks and cenozoic invertebrate palaeontology, as follows: (1) 

 For educational purposes, to teachers, to isolated students, etc. ; (2) in 

 return or exchange for material received for the Museum from collect- 

 ors; (3) for the promotion of science by enabling special students to 

 compare and study forms otherwise inaccessible to them. 



Agassiz, Prof. Alexander, Cambridge, Mass. Deep-sea Pelecypod mollusks (about 250 

 species and a much larger number of specimens), dredged by the U. S. steamer 

 Blake, under the direction of Professor Agassiz; determined, classified, and de- 

 scribed. This work, concluded with the current year, has in reality occupied 

 much of the curator's leisure for the last seven years, and the results are believed 

 to be important for science. 



Boyce, S, E., Santa Barbara, Cal. Forty-seven specimens, 21 species, sent in return 

 for economic mollusks received by the Museum. (June 10, 1886.) 



Bryan, 0. N., Marshall Hall, Md. About 150 specimens, 50 species of shells, furnished 

 iu exchange. (October 10, 1885.) 



Greely, Lieut. Adolphus W., U. S. Army. A number of specimens and drawings made 

 or collected at Lady Franklin Bay; identified as far as practicable. (April I, 

 1886.) 



Haddon, Prof. A. C, Royal College of Sciences, Dublin, Ireland. Chitons (20 specimens, 

 14 species) furnished, for study. (July 9, 1885.) 



Hemphill, Henry, San Diego, Cal. Names of shells furnished on various occasions, 

 also shells (12 specimens, 6 species) in exchange (July 9, 1885.) 



Hittell, J., Allentown, Pa. Shell of Teredo, for study. (November 26, 1885.) 



Jackson, Rev. Sheldon, Washington, D. C. Information furnished. (February 3, 1886.) 



Knott, TV. T., Lebanon, Ky. Shells (105 specimens, 44 species) sent in return for con- 

 tributions to the Museum. (October 20, 1885.) 



Lehnert, Rev. E., Washington, D. C. Florida shells, named in response to personal ap- 

 plication. (December 19, 1885.) 



Lockley, Miss Louise, Butte, Mont. Shells (160 specimens, 83 species), as educational 



series. (February 12, 1886.) 

 McMurrich, Prof. J. Playfair, Johns Hopkins University, Baltimore, Md. Information 



furnished on written application. (January 7, 1886.) 

 Mazyck, W. G., Charleston, S. C. Shells named. (January 21, 1886.) Information 



furnished. (May 10, 1886.) 



* Bulletin 28, CJ. S. National Museum. 



tBulletiu 23, U. S. National Museum, prepared by Newton P. Scudder. 



H. Mis. 170, pt. 2 12 



